advanced~3h
Capstone: Building a Second Microservice — AuditService
A capstone walkthrough building an AuditService that consumes events from a primary service via SQS, persists an audit trail to DynamoDB, and exposes a query API — demonstrating end-to-end event-driven multi-service architecture with SQS, DynamoDB, and cross-service IAM roles.
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Subtopics
🎓 Learning objectives
- •Design an event-driven consumer microservice that decouples from its upstream producer via SQS
- •Model an append-only audit trail in DynamoDB with query patterns that support real compliance lookups
- •Configure least-privilege, cross-service IAM roles so AuditService can only do exactly what it needs to
- •Reason about idempotency, ordering, and failure handling in an SQS-driven consumer
- •Expose a secure, paginated query API over an audit trail without leaking data across tenants
- •Explain, end to end, how two independently-deployed services stay correctly in sync via asynchronous events rather than direct calls
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Related concepts
sqs-fundamentalssns-fundamentalsdynamodb-data-modelingiam-roles-cross-service-accessevent-driven-architecture-patterns